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3 years ago

Which statements apply to density? Check all that apply.

1 answer:

7 0

The only statement on the options that says true about density is:> The density of an object determines whether it will sink or float.

Why?Density is a physical property of an object.

Density is not derived as a unit of measure. It is derived from 2 fundamental units: kg and m.

The Density of an object is not constant.

Density is calculated by dividing the mass by the volume of an object.

Read more on Brainly.com - brainly.com/question/1289384#readmore

The density of an object is constant.

Density is a derived unit of measure

The density of an object determines whether it will sink or float.

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What type of wave is produced when you move one end of a horizontal spring up and down?

Volgvan

A. a transverse wave is produced

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3 years ago

An architect is redesigning a rectangular room on the blueprints of a house. She decides to double the width of the room, increa

Vladimir79 [104]

Answer:3.6

Explanation:

Given

Architect decide to double the width

length increases by 50 percent

height increases by 20 percent

Let L,B,H be length,height and width of rectangular room

L'=1.5L

B'=2B

H'=1.2H

therefore new volume V'=L'\times B'\times H'

$V'=1.5L\times 2B\times 1.2H$

V'=3.6LBH

new volume is 3.6 times the original

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3 years ago

Sound Waves can be used to measure ocean depth. This done by sending a sound wave to the floor of the ocean and recording the ti

vazorg [7]

When the sound wave returns to the machine, you can measure
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(You may notice that it's working just like RADAR, which does the
same thing with radio waves instead of sound waves.)

Even if you know how long the sound took to get to the bottom and
return to the top, you can't DO anything with this information if you
don't know the SPEED of the sound through the water. Not only
the inventory of this machine, but anyone who uses it, has to know
the speed of the sound through water in order to use the round-trip
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3 0

3 years ago

A certain mountain road is inclined 3.1° with respect to the horizon. what is the change in altitude of the car as a result of i

BigorU [14]

$Given:\\ \alpha =3.1^\circ\\l=2.90km\\\\Find:\\h=?\\\\Solution:\\\\h=l\sin\alpha \\\\h=2.90km\cdot \sin 3.1^\circ=2.90km\cdot 0.054=0,1566km=156.6m$

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3 years ago

A swinging pendulum has a total energy of <img src="https://tex.z-dn.net/?f=E_i" id="TexFormula1" title="E_i" alt="E_i" align="a

Zolol [24]

Answer:

$\frac{E_{2}}{E_{1}} \approx 1 -\frac{3\theta}{1-\theta}$ (for small oscillations)

Explanation:

The total energy of the pendulum is equal to:

$E_{1} = m\cdot g \cdot (1-\cos \theta)\cdot L$

For small oscillations, the equation can be re-arranged into the following form:

$E_{1} \approx m\cdot g \cdot (1-\theta) \cdot L$

Where:

$\theta = \frac{A}{L^{2}}$ , measured in radians.

If the amplitude of pendulum oscillations is increase by a factor of 4, the angle of oscillation is $4\theta$ and the total energy of the pendulum is:

$E_{2} \approx m\cdot g \cdot (1-4\theta)\cdot L$

The factor of change is:

$\frac{E_{2}}{E_{1}} \approx \frac{1 - 4\theta}{1-\theta}$

$\frac{E_{2}}{E_{1}} \approx 1 -\frac{3\theta}{1-\theta}$

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3 years ago